Mal-PEG4-NHS ester
- CAS NO.：1325208-25-0
- Empirical Formula: C19H26N2O10
- Molecular Weight: 442.42
- MDL number: MFCD20230464
- Update Date: 2026-05-11 15:21:01
What is Mal-PEG4-NHS ester?
Description
Mal-PEG4-NHS ester is a PEG linker containing a maleimide group and an NHS ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.
Properties of Mal-PEG4-NHS ester
| Boiling point: | 580.5±60.0 °C(Predicted) |
| Density | 1.36±0.1 g/cm3(Predicted) |
| storage temp. | under inert gas (nitrogen or Argon) at 2-8°C |
| solubility | Soluble in DCM |
| pka | -2.34±0.20(Predicted) |
| form | Solid-Liquid Mixture |
| color | Off-white to yellow |
| InChI | InChI=1S/C19H26N2O10/c22-15-1-2-16(23)20(15)6-8-28-10-12-30-14-13-29-11-9-27-7-5-19(26)31-21-17(24)3-4-18(21)25/h1-2H,3-14H2 |
Safety information for Mal-PEG4-NHS ester
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Mal-PEG4-NHS ester
| InChIKey | TUPOSLKVPPFQGR-UHFFFAOYSA-N |
| SMILES | C(ON1C(=O)CCC1=O)(=O)CCOCCOCCOCCOCCN1C(=O)C=CC1=O |
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